Two-speed lawn-mower.



E. LOCKWOOD. TWO SPEED LAWN MOWER. APPLICATION FILED AUG-10.1915.

1,160,297. Patented 1w. 16,1915.

fjwuemioz LOQWCUDQD N. SJM

ELMER LOCKWOOD, OF BYRON ILLIN OIS.

TWO-SPEED LAWN -1VIOWER.

To all whom it may concern 7 Be it known that I, ELMER LooKwooD, acitizen of the United States, residing at Byron, in the county of Ogleand State of Illinois, have invented certain new and useful Improvementsin Two-Speed Lawn- Mowers, of which the following is a specification. Il

The present invention relates to certain new and useful improvements inlawn mowers, and has for its object to provide a device of thischaracter which embodies novel features of construction whereby therotary cutter may becaused to rotate at different same on the line 22speeds so as to operate in the most effective manner upon differentkinds of grass, a high speed being preferable for long grass, while alow speed is preferable for short grass. 1

Further objects of the invention are to provide a lawnmower of thischaracter which is comparatively simple and inexpensive in itsconstruction, which can be quickly adjusted to cause the cuttertorevolve at either a high speed or a low speed, which will not get outof adjustment after being once set, and which has a rigid and durableconstruction With these and other objects in view, the inventionconsists in certain novel combinations and arrangements of the parts aswill more fully appear as the description proceeds, the novel featuresthereof being pointed out in the appended claims.

For a full understanding of the invention, reference is to be had to thefollowing description and accompanying drawing, in which z- Figure l isa top plan view of a lawn mower constructedin accordance with theinvention, the handle being removed. Fig. 2 is a transveise sectionalview through the of Fig. 1 looking in the direction of the arrows. Fig.3 is a transverse sectional view through one of the traction wheels, onthe line 3-3 of Fig. 4. Fig. 4 is a rear view of one end of the lawnmower with portions being broken away and shown in section to illustratemore clearly the details of construction.

Corresponding and like parts are referred toin the following descriptionand indicated in all the views of the drawing by the same referencecharacters. @Specifically describing the present emspecification ofLetters Patent.

bodiment of the invention, the numerals 1 designate the usual circularend plates of he main frame, said end plates having the flanged drivingwheels 2 pivotally mounted thereon and being rigidly connected in somesuitable mannerv as by means, of the cross bar so as to provide a mainsupporting. frame" for the cutting mechanism. The flanged wheels 2 aremounted upon thepivot bolts 4 in the usual manner, and each of the saidflanged drive wheels is provided with a large interior rack 5 and acomparatively small concentric gear 6. These comparatively small gearmembers 6 mesh with idlers 7 which are pivoted at 8 upon the end plates1 and arranged within the 1101- low spaces provided by the flanged drivewheels.

Each of the end plates 1 is provided upon the inner face thereof with apair of guide flanges 9 Whichcooperate with each. other to provide aninclined guideway within which a slide bar 10 is mounted. The lower endsof the slide bars 10 have the roller'll journaled between the same, andare connected by a bed l2 upon which the fixed knife blade 13 ismounted. The rotary blades 14 are mounted for cooperation with the fixedblade 13, being carried by suitable arms 15 which project from thecutter shaft 16, the ends of the cutter shaft being journaled withinsuitable bearings provided in the slide bars 10 and projecting throughslots 17 into the hollow spaces within the respective flanged drivewheels 2. Pinions 18 are applied to the extremities of the cutter shaft16, and spacing blocks 19 are shown asinterposed between the pinions 18and the end plates 1. These pinions 18 can be caused to. mesh witheither the large interior racks 5 or with the idlers'? driven by thecomparatively small gear members 6. In the former instance the cuttershaft 16 and rotary blades 14: would be revolved at a high rate ofspeed, while in the latter instance the cutter revolve at a lower rateof speed.

The shifting of the pinions 18 for changing the speed of rotation of therotary cutter is controlled by the movement of the r Patented Nov. 16,1915. Application filed August 10, 1915. Serial N o. 44,723. i I

shaft and blades would slide bars 10 withinthe guide flanges 9. An

' to the side bars for sliding the same to cause the pinions of thecutter shaft to mesh with either the interior racks of the drive Wheelsor the idlers, and latch members coiiperating With the operating leversto lock the side bars in an adjusted In testimony whereof I affixposition.

my signature the presence of two Witnesses.

Witnesses ELMER LOCKWOOD.

RALPH LocKwoon,

A. BOY MIZ Gopies of this patent may be obtained for five cents each, byaddressin Washington, D. C.

